ultramarine in French

(archaic) Beyond the sea.

Of a brilliant dark blue or slightly purplish color like that of the pigment (noun sense 1).

Of a brilliant dark blue or slightly purplish color like that of the pigment (noun sense 1).

In full ultramarine blue: a brilliant blue pigment traditionally made from ground-up lapis lazuli, and now usually either extracted from mineral deposits or made synthetically.